1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0377f5151e9ec78b3e5bee24f39341711670213bcd56ca21fd4ccad899bf1b0b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db593706-d6e9-45ac-8425-d2bd5334aec6.json and https://artists.proofprofile.net/proofs/artist/db593706-d6e9-45ac-8425-d2bd5334aec6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712c4d69a4e2646bb80bc2ac36081b1466a82885a91703f297a656f6d35cde69. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388b38bb91d43140e592a17b82094fd64d40a34006abe50bc3c4ef480a5b9862. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102401097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e9d38a90bcf26cea71cb10e21ad27719c591bde955da23a7b9b186ad96445. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bde36497f5f9da9dbf1ff3f38a569401cf66999e16647150f0d859f8151d37. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921901783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ab1e590c2fe41bba3bf25c8be661becd96496d1c6529f33d170a7789e90e66. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921901784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b586fa8619cfde1c1fa47414c7e74278c0384833b7ea10c0c247c3d26ecb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921901785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1015c6984a16095d28a5f64674d8841696c90b00e0f8ef6eab05a14348fe2742. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921901787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37eb401c44856b8a3cf726ff7d79ec9c9aa1e7900edb6baa9e94a36e66e824e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921901788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48864893a4cc0d32e4e4260640fc7aa0ebee51e380bb73ccae0916042b4ad439. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921901791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d17024df36cf9cdc299449d51eaa6dd821d1b7abe0ea2b606c5b03786c648aa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921901793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3690f6686a0fac72cd2a054b98cb39ed09e5c6846a413978cd05da3e83932b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921800295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfae0e33e4d025e2d1d6e941e5e577012bf3275430097e92b39bd86776a7083. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e68c3fba3fb33adc757dc97dcebc86e5bdf8696dd710c78be5d284ef4da7562. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803a06a76d42b02053b8d9350190b8dc40afa74b0b42c43596c51c935eecac7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921800303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a93a5c90aa593c53ea5161e4ac12fa48dc3afc92145b34463ca43d6728d8da. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c011a5c10b6a4127b0ecb7a9fdcf533331c262adc284e0783e2364b7684ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8362c8bf6bf42e1b715b7c1a2bb2eeba281cd0776f9a2e1bc4fd22cf9648196. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02055e860d865c158cbe57daa01ddc2e61fa7107513256bb7781ce56a638d9db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa593827ff0ecf2fe7ec230001dc61863050fb1a8842b78b148016633a7e4e28f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7afbbf56b557de884a50bdb243e7885e71c5d2f45a6b73dd49213dedb7dcbd7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8a896c7d5d9af0baaa73aa45668071352b747e35c3bd3c8e601beac8269eb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a65f58fee5cd76db90ebb0106ef4c1521d5fb4ae00746ecd80f03f9c70588ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcaf6921310b49f27412d176b7517f340e3e2065607630f3ed228a49ab4e601. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d62b3b2d7bb328f941884250920de2c317f2382deabe042e013079984f5e6cd. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0af13f440d2a23a50b2bf58b41c57cf6661047a5fe99f508ceef415ef2443f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921708794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6224fa4a80099b2c528f9d159db1ff63b29a48b1548f614e96996ff5aafef80b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102400103.
夏がしつこくインターフォンを鳴らしているが、僕はいないふりをしている
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a15c9e373c0a5d826f39f4457f81066bb77ee84328544ed15022b85492d1859. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fe4c926d9b36c83dd684324b13f66f8f7ead8de66f97ce2db6ae5daf61ca6e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101900683.